West Ham United's Marko Arnautovic celebrates with supporters after scoring his side's opening goal during the English Premier League soccer match between West Ham United and Chelsea at the London stadium in London, Saturday, Dec. 9, 2017. (AP Photo/Alastair Grant)

West Ham United's Marko Arnautovic celebrates with supporters after scoring his side's opening goal during the English Premier League soccer match between West Ham United and Chelsea at the London stadium in London, Saturday, Dec. 9, 2017. (AP Photo/Alastair Grant)